package map;
/*
map的遍历

 */

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

public class MapDemo2 {
    public static void main(String[] args) {
        Map<String,Integer>map=new HashMap<>();
        map.put("语文",99);
        map.put("数学",98);
        map.put("英文",97);
        map.put("物理",96);
        map.put("化学",99);
        System.out.println(map);
        /*
        遍历所有的key
        set<k> keySet
         */
        Set<String > keySet =map.keySet();
        for (String key : keySet){
            System.out.println("key:"+key);
        }

        Set<Map.Entry<String ,Integer>> entrySet=map.entrySet();
        for (Map.Entry<String,Integer>e:entrySet){
            String key =e.getKey();
            Integer value=e.getValue();
            System.out.println(key+":"+value);
        }
            Collection<Integer> values=map.values();
            for (Integer value:values){
                System.out.println("value:"+value);

            }
            map.forEach((k,v)->System.out.println(k+":"+v));




    }
}
